Tyfjswriting and calculating machine



June 13, 1933. 5, 52

TYPJSWRITING AND CALCULATING MACHINE Filed July 12 1928 .3 Sheets-Shem.

Invenfor:

GusTav Mez.

7 anion,

June 13, 1933. G. MEZ

TYPEWRITING AND CALCULATING MACHINE Filed July 12 1928 3 Sheets-Sheet 2June 13, 1933. G. MEZ 1,913,892

TYPBWRITING AND CALCULATING MACHINE Filed July 12 1928 5 Sheets-Sheet 382 M f I! as i 711; I /*M n 73 Patented June 13, 1933 UNITED s'rA'r Es'PATENT OFFICE GUSTAV IEZ, PM NEAR BERLIN, GERMANY, ASSIGNOR TO MERCEDESB'U'ROIASCHICKEN-WERE AKTIENGESELLSCHAFT, 0F BENSHAQ'SEN, GERMANYmuwmrme m cancumvrme magnum Application filed July 18, 1928', Serial No.892,075, and in Germany July 29, 192 7.

This invention relates to an appliance for the optional skipping of thecomma lock in typewriting and calculatin machines.

n typewriting and calcu ating machines it Es customary to lock thewriting and calculating keys in the comma. position of the countingmechanisms in order to prevent the introduction of values. This lockinghowever has been found e'xce'edingly inconvenient when makingcalculations in which the commas are in some cases not written, sincethe operator, when working rapidly, is liable to overlook the fact thatthe comma place is in the operative position, and, when the calculatingkey locks, he only becomes aware, after a glance at the indicatingdevice, of the fact that a calculation in this position is impossibleand that the space bar must be depressed to feed the carriage forward.

This disadvantais obviated accordin to the present invention owing tothe fact at a member arranged on the vertical countingmechanism andcontrolling the locking of the calculating keys through the medium of afeelin member, at the same time controls the loose eed tooth thatdetermines the advance of the carriage, and by means of this member thecarriage can be caused to skip a plurality of steps. This controlling isonly effected when actuating the numeral calculating keys, as thefeeding of the carriage remains unchanged during the actuationoi thenumeral griting keys and also of the letter writing gne constructionalform of the invention is illustrated by way of example in theaccompanying drawings, wherein Fig. 1 shows a side elevation of atypewriting and calculating machine, in which certain parts of the frameare shown broken away in order to'disclose other parts of the apparatus,

Fig. 2 shows a front elevation of the machine shown in Fig.1 looking inthe direction of the arrow A in Fig. 1, and

Fig. 3 shows a view of thecarriage lock shown in Fi 1, looking in thedirection of the arrow B 1n Fig. 1.

Fig. 3a is an enlarged, fragmentary view looking in the direction ofthearrow B of .key and the parts operated thereby in operative positionat the moment when the .cou- L pling operating the counting slide isopened.

11 a frame 1 are arranged in a known manner a front carriage rail or.way rod 2 and a rear carriage rail or way rod 3, upon which thecarriage'5 and the cylinder 4 are hori zontally displaceable in a knownmanner.

On the carriage 5 is arranged'a rail 6, by which vertical countingmechanisms 7 and 7 are carried in a known manner.

The carriage 5 is constantly urged from right to left, as seen in Fig.2, by a known carriage-traction spring, not shown. When a writing key T1s depressed, the traction hook T is brought by a tappet lever Tarranged on the writing key lever T into en-, gagement with a cam shaftT, which revolves continuously in the direction of the arrow, wherebythe traction hook T is moved against the action of a spring T Since thetraction T which is oscillatable about the point T the lever T isdeflected in a clockwise direction, and by means of its pin T it bringsthe type leveit8 into contact with the cylinder 4. Under thesecircumstances the lug 8a on the type lever 8 acts upon the universal bar86, which deflects the lever 803, which is rotatably mounted about apoint 80, in an anticlockwise direction. By this means a rod 8e pivotedto the lever 8d is moved in the direction of the arrow 8f, in which caseit deflects against the action of the spring 8f, a carriage swing 82',which is oscillatable about the point 8g, and 8k, and on which a loosecarriagefeed tooth 82 and a fixed carriage-feed tooth 82] are arranged.If'the carriage swing 811 is rocked counter-clockwise in the directionof the arrow 8f- (Fig. 1) by the movement of the hook T is pivoted atthe point'l to a lever V rod 8e the loose feed tooth 82 is brought outof engagement with its lug 82a while the fixed feed tooth 82f is alreadyin engagement with the ratchet-wheel 83 before the loose feed 5 tooth 82is disengaged. A feed of the carextent clockwise until it bears with itsedge 86 against the block 81. The loose feed tooth then occupies theposition shown in Figure 3a i. c. it is located with its lug 82aopposite the next tooth space 87 and it occupies this position when thetype lever 8 strikes against the cylinder 4. When the type lever 8returns to its position of rest shown in Figure 1, the swing 871 alsoreturns to its position of rest (Fig. 1) under the action of the spring8f whereupon the fixed feed tooth 82; is brought out of engagement withthe ratchet wheel 83 while the loose feed tooth 82 engages with its lug82a in the tooth space 87 i and since the ratchet wheel 83 secured onthe rotatably mounted axle 83a is rotated by the carriage tension spring(not shown) over the rack 835 secured on the carriage 5 and the toothedwheel 830 secured on the axle 83a is rotated in the direction of thearrows indicated in Figures 3, 3a and 3b, the tooth 88 of the ratchetwheel 83 bears .on the lug 82a of the loose feed tooth 82 and rocks itout of the position shown in Fig. 3a into the position shown in Fig. 3,whereby the carriage 5, 6 (seen in Fig. 2) is moved one step to theleft.

v The block 81 is provided with bosses 81a and 81b and is slidably butunrotatably mounted on the journal 810 secured in the swing 8d. Theblock has a pin which is embraced by a bifurcated slot of the lever 78ads. ted to rock about the point 79. The lever 8 has play in itsconnection at the point 79 so that when the swing 8i oscillates the saidlever is adapted to participate in the swinging movement. There issecured on the upper end of the journal 810 a bracket 81d to which thealready mentioned spring 84 is susnded. There is also connected at thepoint 8a of the lever 78 a lever 76 which may be moved in the directionof the arrow 7 6a hereinafter described.

It is obvious that in connection with the said movement or displacementof the lever 7 6, the block 81 will be lifted over the lever 78 out ofthe position shown in Fig. 3a into the position shown in Fig. 36 whereinit bears with its boss member 81a against the bracket 81d. If a typelever 8 now strikes against the cylinder 4, the loose feed tooth 82 willswing out under the tension of the spring 84 until it bears with itsmember 86a against the block 81, as is shown in Fig. 36. It will swingout to such an extent that when the on and rock it about its pivot tosuch an type lever 8 returns to its position of rest, the said loosefeed tooth 82 will not be able to drop in the next tooth space 87 of theratchet wheel 83 but in the tooth space 89 of the ratchet wheel 83 sothat it enters into engagement with the tooth of the ratchet wheel 83.Consequently, it is readily obvious when comparing Figures 3a and 3?)that the ratchet wheel 83 will permit the carriage 5 to move twocarriage steps. On the front of the typewritin machine is fixed thecalculating mechanism y its rear wall 9, which carries all thecalculating mechanisms, as shown in Fig. 1. In the two side walls 1a and11) (Fig. 2) of the frame 1 is journalled the driving shaft 10 fordriving the calculating mechanism.

This driving shaft 10 is continuously rotated in the direction of thearrow 13 by a continuously rotating motor 11 through the medium of asuitable worm drive lodged in a casing 12, a ratchet wheel 14 mountedfast on the shaft 10 also participating in this rotation. Such a ratchetwheel is provided for each of the ten calculating keys 15.

The calculating-key levers 16, are rockable about a pivot 17 in themachine frame and are normally held in the position of rest, shown inFig. 1, by a spring 20 attached at one end to a hook 18 on the lever 16and at the other end to a stationary hook 19. Th normal position of restis determined b the hook 18 bearing against an abutment edge 21 fixed onthe machine frame. If the key 15 is depressed, and the lever 16 therebyrocked about its pivot 17 in a clockwise direction, it releases with itsfree arm 16a the lug 23a of a pawl 23 which is slidably arranged on aclutch disc 22, which is rotatably arranged on the shaft 10, and thepawl 23 is accordingly displaced, under the action of a compressionspring 24 actin upon it, in the direction of the arrow 25, an its lug 26comes into engagement with the continuously revolving ratchet wheel 14.By this means the disc 22 corresponding to the key that has beendepressed, is coupled to the ratchet wheel 14 and therefore to the shaft10, so that it participates in the rotation thereof. When the key 15 isdepressed or the pawl 23 released by the key lever 16, a locking bar 28slidably arranged thereon by means of a rivet 27 and of the pivot 17 issimultaneously oscillated with it, whereby its lug 29 comes out ofengagement with the abutment ledge 21. As a result of this the lockingbar 28, under the pull of a spring 30 attached at one end to it and atthe other end to the key lever 16 slides in the direction of the arrow31. Under these circumstances its lug 29 passes underneath the abutmentledge 21, as shown in Fig. 5, and holds the key 15 in its depressedposition, while the lug 28a formed thereon moves into the path ofrotation of a lug 23a formed on the pawl 23. Shortly before thecompletion of one complete revolution of the row 31. The key 16"canconsequently-M turn, under the action of the spring 20, into its normalposition, shown in Fig. 1. striking against the locking bar 28" the pawl23 is at the same time brought out'ofengagement with the continuouslyrevolving ratchet wheel 14, and thereby the cam disc 22 is stopped. Whenthe key lever 16 returns'to its position of rest, the lug 28a of thelocking member 28 releases the lug 23a of the pawl 23 and immediatelythereafter the lug 23a of the pawl 23 bears on the arm 16a of the keylever 16, whereby all-partsagain occupy their position shown in Fig. 1.s The passage of the lug 23a of the pawl 23 from the lug 28d of thelocking member 28 on to the arm 16a of the key lever 16 is so short thatthe pawl 23 cannot drop again in the ratchet wheel 14. \Vitheach camdisc 22 controlled by the calculating keys 1'6 is'associated avaluerproducin'g member 32, which is shown broken away in Fig. 1 for thepurpose. of better illustration of-the parts helonging tothe invention,and is designated 16 in the patent application Serial No. 632,- 480, ofApril 16, 1923, now Patent 1,862,240. It is kept constantly inpower-transmitting connection with the cam disc 22 by a tension spring,which is designated 18a in said patent application, attached to themember 32, by means of an anti-friction roller 33 arranged at its lowerend. During the rotation of the cam disc 22 the value-producing member32 therefore travels downwards in consequence of the construction of thecurve, under the action of said spring whereby the value correspondingto the key depressed is brought into the counting mechanism 7 located inthe working position, in a known manner which is described in detail insaid patent application No. 632,480, and at the same time, by the actionof a pin 32a, designated 34 in said ap lication fitted tothevalue-producing member 32, is caused to press upon the associated keylever T It is obvious from the above that the valueproducing member 32is always pressed downward by the action of the spring not shown andwill, therefore, tend to actuate the cam disc 22 in the direction of thearrow 13 in the position shown in Figs. 1 and 5. Since the spring, notshown, is considerably stronger than the spring 30'acting on the lockingmember 28 and the "spring 30 is' stronger than the spring 24 acting onthe pawl 23, the efi'ect will be attained when the lug 23a of'the pawl23 bears on the lug 28a oft-he locking member 28, according to Fig. 5,that the latter with its lug 29 will brought out of engagement with theledge 21 and held even when the key 15 is held in the depressedposition. If the key 15 is then re leased and the lug 23a of the pawl 23released by the lug 28a of the locking member 28, the camdisk 22 will befurther rotated in the direction of the arrow 13 by the spring (notshown) engaging on the value-producing By member .32, whereby the partsagain occu y the relative position shown in Fig. 1. I a key 15 isstruck, only one rotation of the cam disk 22 takes place regardless ofthe fact whether the key 15 is immediately released again or held in thedepressed position.

' The apparatus hitherto described is known in all its parts and hasonly been briefly summarized for the better elucidation of theinvention.

Underneath the calculating ke. levers 16, which are oscillatablysupported about the pivot 17, is arranged a rocking member 34, which issupported in small bearing brackets 37 and, 38 fixed to the shaft 17 andthe ledge 21 and arranged to left and right inthe machine frame, bymeans of journals 35 and 36 formed on the said rocking member, as shownin Figs. 1, 2, and 4 and is held in the position illustrated in Fig. 1,by a spring not shown. On the left-hand side of the rocking member 34 isformed a pin 39, to which is attached a connecting rod40, which ispivotally connected at its other end by a pin 41 with a lezver 42, whichis oscillatable about the pivot l To the free arm of the lever 42 isfitted a roller 43, by means of which it can act upon a rod 44. The rod44 is provided at its lower part with a longitudinal slot 45, in which ascrew extension 46 engages and thereby guides the rod 44. At its upperend the rod 44 is guided by virtue of the fact that by means of a lug orflap 48 formed thereon projecting through a slot 47 into the calculatingmechanism it is pivotally connected b a screw 51' with a lever 50 whichis rotata le about a bolt 49 on the-machine frame. The lever 50 isnormally held by the weight of'the rod 44 in the position shown in Fig.2.

To the machine frame is pivoted by means of a-screw 52 a lever 53 whichis normally pulled by a spring 54 against an abutment 55.

counting mechanism. vThe position which the lever 53 occupieswhenengaging in a recess, is shown in Fig. 2.

- If a calculating key 15 is depressed, the

key lever 16 deflects about the pivot 17 in a be clockwise direction.Owing to this the'lug 18 formed thereon strikes against the rockingmember 34 and rocks the latter in a clockwise direction. This rockingmovement is transmitted by the connecting rod 40 to the lever 42 so thatthe same is deflected in a clockwise direction. 4 During this deflectionthe roller 43 arranged on the lever 42 acts upon the rod 44 and raisesit. The rod 44 thereby rocks the lever 50 about its pivot 49 .n aclockwise direction. This rocking movement can however only take placewhenthe lever 53 is not projecting into the path of oscillation of thelever 50, that is, when the lever 50 is rocked by the action of the bar(a of the vertical counting mechanism 7 in a clockwise direction in sucha way that it comes out of the operative position in relation to thelever 50. This however is only the case when a counting position of thecorresponding vertical counting mechanism is in the operative condition.In the other case the lever 53 lies in the path of oscillation of thelever 50, as illustrated in Fig. 2, whereby a deflection of the lever 50and therefore 9. raising of the rod 44 is prevented. In this way anoscillation of the lever 42 and of the rocking member 34 and therefore adepression of a calculating key 15 is prevented.

The position illustrated in Fig. 2 shows the left-hand side wall of thevertical counting mechanism in the working position of the machine. Nowif the next counting position of the vertical counting mechanism is tocome into the operative condition, the carriage is moved one step to theleft by striking the known space bar L, in which case the projectingpart 7d formed on the bar 7a runs on to the lug 56 of the lever 53 andthereb oscillates the latter against the action of t e tension spring54, so that now the lever 53 sets free the lever 50. v

Hence a depression of the calculating keys 15 can only take place when acounting position stands in the working position but not when a sidewall stands in the working position. If a comma position comes into theoperative position,the lug 56 of the lever 53 enters one of the recesses7 b and likewise locks the calculating keys. The same thing also,happens if the right-hand side wall enters the working position of themachine.

Upon a comma position of the counting mechanism entering the workingposition of the machine, the calculating keys 15, in the constructionalform described above, are

therefore locked against depression. In order topass from the commaposition into the next calculating position of the counting mechanism,it is necessary, as known, to strike the comma key, or, if the writingof the comma is not desired, to strike the space bar. The latter methodof working is however a waste of time, inasmuch as the operator mustfirst pay attention to the locking of the cal- In order'to obviate thisloss of time a device is provided b means of which the machine can be soa justed that the paper carriage or the counting mechanism does notfirst remain in the comma osition at all but skips it at once. This is eected by means of a device hereinafter described, which is controlledfrom the vertical counting mechanism, and which influences the loosecarriage feed tooth cooperating with the ratchet wheel in such a waythat after the striking of a calculating key in the counting mechanismposition located at the left-hand side of the comma a double-carriagestep is effected.

In order to'attain this, there are arranged on the bar 7a, which servesfor controlling the lockin lever 53, forwardly projecting lugs 7w an 7 mwhich are located in the vertical lane of the counting mechanismpositions Focated on the left beside the existing comma positions. Withthese lugs there cooperates a feeling lever 57 which is pivoted to themachine frame by means of the same screw 52 as the lever 53, and isconstantly urged in an anti-clockwise direction by a spring 58, so thatin its position of rest it bears against a stationary abutment in 59.

In the front wall 0 the calculatin mechanism is rotatably sup rted anadjusting knob 61, which is rovide with a pointer 60 and at the rear endof which is fixedly arranged a lever 62, which has a rearwardlyprojectin flap or lug 63. This flap 63 is provided wit a bore, in whicha rod 64 is so supported as to be slidable in an axial direction and isheld by a spring 65 constantlv in a definite position in relation to thelever 62 and its flap 63. A pin 66 arranged in the rod 64 bears from therear against the fla 63, against which there bears on the other side thespring 65, which at the other end constantly urges a disc 68, which issecured to the rod 64 by means of a in 67, in the direction of the arrow69. T e rod 64 is slidably supported at its left-hand end in a hole 70,shown in Fig. 2, in a bell-crank lever 72, which is oscillatablyarranged on the machine frame by means of a screw extension 71.

The bell-crank lever 72 is connected by means of the rod 73, with thebell-crank lever 75, which is oscillatably arranged on the rear part ofthe machine by means of the bolt 74, a rod 76 being pivoted by means ofa bolt 77 to a rearwardly projecting arm of the bellcrank lever 75. Therod 76 is pivotally connected at the point 78a, as shown in Figs. 3a and3b, with a lever 78, which ,is rotatably supported on the machine frameat its ri hthand end at the point 79, and with its ree fork-shaped endembraces a pin 80 on a raising block 81.

The method of operation is as follows If for example thehundreds-of-thousands a calculatin carriage carrying the countingmechanisms springs one step to the left, so that the tens-of-thousandsosition of the counting mechanism moves lnto the wor g position of themachine. If a calculating ey is again struck, for instance the keycorresponding to the value 2, and the carriage feed takes placeaccordingly, the thousands .position of the counting mechanism movesinto the operative position. Under these circumstances the lug a: at thesame time runs up on to the feeling lever 57 and rocks it against theaction of the tension spring 58 attached to it, in which case the saidfeeling lever 57 acts upon the rod 64 with the downwardly projectingflap or lug 57a formed on it. B

this means the rod 64 is shifted to the le t and thereby moves out ofthe hole 70 in the lever 72 into the path of movement of the extension44a of the rod 44. If a calculating key is now struck. again, forinstance the one corresponding to the number 5, the amount is reckonedin the known manner. During this procedure the upwardly traveling rod 44strikes with the shoulder 440: formed thereon against the rod projectinginto its path, and moves the latter upwards, whereby a rocking of thebell-crank lever 7 2is brought about m an anti-clockwise direction. Thisresults, b means of the connecting rod 73, in a rocking of thebell-crank lever 75about the pivot 74, whereby the rod 76 in its turnisraised, and through the medium of the lever 78 effects the raising ofthe raising block 81 into the lposition shown in Fig. 3b.

Owing to this t e loose feed tooth deflects until its edge 86a bearsagainst-the raising block 81, as shown in Fig. 3?), this oscillationcorresponding in am litude to two teeth of,

the ratchet wheel, so hat upon the shoulder 8a of the type lever 8striking against the universal bar 86 a springing of the carriage iseffected not merely through one carriage step but through two carriagesteps. Hence the carriage or the counting mechanism springs directlyfrom the thousands position into the hundreds position, skipping theposition of the comma. The lever 57 is then released again by the cam72:, so that under the influence of its spring 58 it returns to theposition shown in Fig. 2. By this process the flap 57a. also sets freethe rod 64, so that it is pulled by its s ring out of reach of theshoulder 44a of the rod 44, whereby also the raising block 81 fallsunder the-influence of the' gintrinsic weight of its rod gear into thenormal position shown in Figs. 3 and 3a.

If-in the further course of the calculation the. counting mechanism thenpasses from the tens into the units position, the lever'57 is similarlydeflected, as described above, by the pin 7%, and the rod 64'isdisplaced towards t e left into the path of the shoulder 44a of t e rod44, so that then, upon the calculating key being struck in the unitsposition, the raising block 81 is raised in the manner described aboveand a double carriage step is again; thereby brought about. Hence thecounting mechanism together with the carriage, springs directly from theunits position into the first decimal place, skipping the decimal point.

By providing a, correspondingly d per In 7 av on the counting mechanismand a secon higher shoulder 44?) on the rod 44 the raisin block 81 canbe raised so high that the feed tooth 82 can swing right out, so that athreefold step ofthe carriage is brought about and a jumping is possiblefrom the lowest position of one counting mechanism 7 into the highestposition of the next counting mechanism 7 As has already been mentionedabove, the adjusting knob 61 is rotatably supported in the front wall ofthe calculating mechanism. Normally it occupies the position illustratedin Fig. 2, in which the pointer 60 fitted to it points to the indicationwith period skip- If however the knob is rotated in such a way that itsointer points to the words without period skipping, the lever 62, whichis rigidly connected with it, is at the same time oscillated, wherebythe rod 64 is brought out of the path of the lever 57.

ping.

The possibility is thereby given of suspend-- 44, is only operative whenstriking the calculating keys 15, while when striking the normal writingkeys T by hand it is completely inoperative, as in this case no movementof the rod 44 occurs. The counting mechanism or the lugs formed thereoncan act upon the lever 57 during the running of the carriage in theusual manner without the raising block being afiected in any way,irrespectively of whether the knob is adjusted to with period skippingor to wlthout period skipping. Thus if the operator passes from thenumeral keys 15 to the writing keys T, nothing special. need be done torender inoperative the double-step or comma-. skipping device, but thisdevice remains inoperative, for the reasons hereinbefore set forth, whenthe writing keys are struck.

What I claim is 1. A typewriting and calculating machine includingnumeral calculating keys, numeral writing keys and a counting mechanismhaving a controlling member wherein-when operating the numeralcalculating keys at the comma position a skipping of the carriage isautomatically released by the cooperation of the controlling member onthe counti mechanism characterized by the fact that when using numeralwriting keys the controlling member remains inoperative on the meanseffecting the skipping of the carriage, 2. A typewriting and calculatingmachine including numeral calculating keys, numeral writing keys, acarriage, space skipping mechanism including a loose tooth andcontrolling means therefor and counting mechanism, a controllin memberassociated with, the counting mec anism, and a coupling memberestablishing connection between the numeral calculating keys and theloose tooth controlling means upon operation of the controlling member.-f

3. A machine as claimed in claim 2 in which the coupling member isadjusted by mechanism actuated by the numeral calculating keys, whichmechanism also forms a part of a locking mechanism for the calculatingmachine, said locking mechanism being rendered effective during spaceskipping operation of the carriage.

4. In a typewriting and calculating machine, a movable carriage, acarria e controlling member, a key operated mem r, a carriage operatedslidable connectin rod between said two members, and carrying means forsaid rod manually operable for rendering said connections between saidtwo members inoperative.

In testimony whereof I have signed my name to this specification.

GUSTAV MEZ.

